U.S. patent application number 12/392008 was filed with the patent office on 2009-12-17 for light guide plate and backlight assembly having the same.
Invention is credited to Moon-Hwan CHANG, In-Sun HWANG, Heu-Gon KIM, Taek-Sun SHIN, Byung-Seo YOON.
Application Number | 20090310336 12/392008 |
Document ID | / |
Family ID | 41414583 |
Filed Date | 2009-12-17 |
United States Patent
Application |
20090310336 |
Kind Code |
A1 |
YOON; Byung-Seo ; et
al. |
December 17, 2009 |
LIGHT GUIDE PLATE AND BACKLIGHT ASSEMBLY HAVING THE SAME
Abstract
In a light guide plate and a backlight assembly having the same,
the light guide plate includes a plurality of light guide cells.
Each light guide cell has at least one incident surface that
receives light from an outside light source. The incident surfaces
of the light guide cells are arranged in non-parallel planes. A
light source unit includes at least one light source adjacent to
the incident surface of each light guide cell. Thus, brightness of
the backlight assembly is improved and thickness of the backlight
assembly is reduced.
Inventors: |
YOON; Byung-Seo; (Dong-gu,
KR) ; HWANG; In-Sun; (Suwon Si, KR) ; KIM;
Heu-Gon; (Yongin-si, KR) ; CHANG; Moon-Hwan;
(Yongin-si, KR) ; SHIN; Taek-Sun; (Asan-si,
KR) |
Correspondence
Address: |
Haynes and Boone, LLP;IP Section
2323 Victory Avenue, SUITE 700
Dallas
TX
75219
US
|
Family ID: |
41414583 |
Appl. No.: |
12/392008 |
Filed: |
February 24, 2009 |
Current U.S.
Class: |
362/97.1 ;
362/327 |
Current CPC
Class: |
G02B 6/0043 20130101;
G02B 6/0046 20130101; G02B 6/0078 20130101; G02B 6/0068 20130101;
G02B 6/0055 20130101; G02B 6/0018 20130101 |
Class at
Publication: |
362/97.1 ;
362/327 |
International
Class: |
G02B 6/00 20060101
G02B006/00; F21V 8/00 20060101 F21V008/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 17, 2008 |
KR |
10-2008-0056903 |
Claims
1. A light guide plate comprising: a plurality of light guide
cells, wherein each light guide cell comprises at least one
incident surface that receives light from outside the light guide
cell and at least one side surface that opposites to the incident
surfaces, and the incident surfaces of the light guide cells are
arranged in at least two directions that are different from each
other.
2. The light guide plate of claim 1, wherein each light guide cell
comprises: a first incident surface receiving a first light; a
second incident surface connected to the first incident surface to
receive a second light; a first side surface connected to the first
incident surface while facing the second incident surface; a second
side surface connecting the second incident surface to the first
side surface while facing the first incident surface; an exit
surface connected to the first and second incident surfaces and
first and second side surfaces to output the first and second
lights; and a reflective surface connected to the first and second
incident surfaces and first and second side surfaces while facing
the exit surface to reflect the first and second lights toward the
exit surface.
3. The light guide plate of claim 2, wherein thicknesses of the
first and second incident surfaces change from first ends to second
ends of the first and second incident surfaces, in which the first
ends of first and second incident surfaces are connected to each
other.
4. The light guide plate of claim 3, wherein the first and second
side surfaces are connected to the second ends of the first and
second incident surfaces, respectively.
5. The light guide plate of claim 3, wherein the exit surface has a
planar structure and the reflective surface comprises: a first
reflective surface connecting the first incident surface to the
first side surface while being inclined toward the first side
surface; and a second reflective surface, which connects the second
incident surface to the second side surface and is connected to the
first reflective surface while being inclined toward the second
side surface.
6. The light guide plate of claim 2, further comprising a diffusion
pattern formed on the exit surface to diffuse a light output from
the exit surface.
7. A backlight assembly comprising: a light guide plate comprising
a plurality of light guide cells, each light guide cell having at
least one incident surface that receives a light; and a light
source unit comprising at least one light source adjacent to the
incident surface of each light guide cell, wherein the incident
surfaces of the light guide cells are arranged in non-parallel
planes.
8. The backlight assembly of claim 7, wherein each light guide cell
comprises: a first incident surface receiving a first light; a
second incident surface connected to the first incident surface to
receive a second light; a first side surface connected to the first
incident surface while facing the second incident surface; a second
side surface connecting the second incident surface to the first
side surface while facing the first incident surface; an exit
surface connected to the first and second incident surfaces and
first and second side surfaces to output the first and second
lights; and a reflective surface connected to the first and second
incident surfaces and first and second side surfaces while facing
the exit surface to reflect the first and second lights toward the
exit surface.
9. The backlight assembly of claim 8, wherein thicknesses of the
first and second incident surfaces change from first ends to second
ends of the first and second incident surfaces, wherein the first
ends of first and second incident surfaces touch each other.
10. The backlight assembly of claim 9, wherein the first and second
side surfaces are connected to the second ends of the first and
second incident surfaces, respectively.
11. The backlight assembly of claim 9, wherein the light source
unit comprises: a first light source adjacent to the first incident
surface to generate a first light; and a second light source
adjacent to the second incident surface to generate a second
light.
12. The backlight assembly of claim 11, wherein the first and
second light sources comprise light emitting diodes installed
adjacent to the first ends of the first and second incident
surfaces, respectively.
13. The backlight assembly of claim 12, wherein each light guide
cell comprises: a first inclined surface protruding outward from
the first incident surface to guide the first light of the first
light source toward the second side surface; and a second inclined
surface protruding outward from the second incident surface to
guide the second light of the second light source toward the first
side surface.
14. The backlight assembly of claim 8, wherein the exit surface has
a planar structure and the reflective surface comprises: a first
reflective surface connecting the first incident surface to the
first side surface while being inclined toward the first side
surface; and a second reflective surface, which connects the second
incident surface to the second side surface and is connected to the
first reflective surface while being inclined toward the second
side surface.
15. The backlight assembly of claim 14, further comprising a
reflective plate installed below the reflective surface of the
light guide plate, wherein the reflective plate has a flat
structure.
16. The backlight assembly of claim 14, further comprising a
reflective plate installed below the reflective surface of the
light guide plate, wherein the reflective plate has a shape
identical to a shape of the reflective surface.
17. The backlight assembly of claim 8, wherein the light guide
plate comprises a diffusion pattern formed on the exit surface to
diffuse a light output from the exit surface.
18. The backlight assembly of claim 7, further comprising a
receiving container having a receiving cavity to accommodate the
light guide plate and the light source unit therein, wherein at
least one light source is mounted on a bottom surface of the
receiving container.
19. The backlight assembly of claim 7, further comprising at least
one flexible printed circuit board installed below the light guide
plate to mount at least one light source thereon.
20. The backlight assembly of claim 19, wherein the at least one
flexible printed circuit board is arranged in a stripe pattern.
21. The backlight assembly of claim 19, wherein the at least one
flexible printed circuit board is arranged in a zigzag pattern.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application relies for priority upon Korean Patent
Application No. 2008-56903 filed on Jun. 17, 2008, the contents of
which are herein incorporated by reference in their entirety.
BACKGROUND
[0002] 1. Field of the Invention
[0003] The present invention relates to a light guide plate and a
backlight assembly having the same. More particularly, the present
invention relates to a light guide plate capable of reducing
thickness of the backlight assembly and a backlight assembly
incorporating the light guide plate.
[0004] 2. Description of the Related Art
[0005] In general, a liquid crystal display (LCD) displays images
by using optical characteristics of liquid crystal. Since the LCD
uses liquid crystals, which are not self-emissive in themselves, a
backlight assembly is positioned behind a liquid crystal display
panel to provide light to the liquid crystal display panel. The
liquid crystal display panel displays images using the light from
the backlight assembly.
[0006] The back light assembly is classified into a
direct-illumination type backlight assembly and an
edge-illumination type backlight assembly according to the position
of a light source. The direct-illumination type backlight assembly
provides light to the liquid crystal display panel by using a light
source installed below the liquid crystal display panel. The
edge-illumination type backlight assembly usually has a light
source positioned next to a light element, such as a light guiding
plate. The direct-illumination type backlight assembly may include
a plurality of light sources. For this reason, the
direct-illumination type backlight assembly may be capable of
providing higher brightness as compared with the edge-illumination
type backlight assembly.
[0007] However, in the direct-illumination type backlight assembly,
a certain distance between light sources and between the liquid
crystal display panel and the light source is maintained to prevent
brightness from being lowered. For this reason, the thickness of
the direct-illumination type backlight assembly is larger than that
of the edge-illumination type backlight assembly.
[0008] The edge-illumination type backlight assembly has smaller
thickness, but the number of light sources that can be used with
this configuration is limited as compared with that of the
direct-illumination type backlight assembly. For this reason, the
edge-illumination type backlight assembly may not be suitable for a
large-size LCD.
SUMMARY
[0009] The present invention provides a light guide plate capable
of improving the brightness of a backlight assembly while reducing
the thickness of the backlight assembly.
[0010] The present invention also provides a backlight assembly
that employs the light guide plate to improve brightness and reduce
the thickness.
[0011] In one aspect of the present invention, a light guide plate
includes a plurality of light guide cells. Each light guide cell
has at least one incident surface that receives light from outside
the light guide cell. The incident surfaces of the light guide
cells are arranged in non-parallel planes.
[0012] In another exemplary embodiment of the present invention, a
backlight assembly includes a light guide plate and a light source
unit. The light guide plate includes a plurality of light guide
cells, which are integrally connected to each other and each light
guide cell has at least one incident surface that receives a light.
The light source unit includes at least one light source adjacent
to the incident surface of each light guide cell. The incident
surfaces of the light guide cells are arranged in non-parallel
planes.
[0013] In yet another aspect, the invention is a light guide plate
including a plurality of inclined structures arranged adjacent to
one another, wherein each of triangular inclined structures is
tilted with respect to adjacent triangular inclined structures.
[0014] According to the above, the light guide plate includes a
plurality of light guide cells and at least one light source is
aligned at one side of each light guide cell, thereby improving
brightness of the backlight assembly and reducing thickness of the
backlight assembly.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The above and other advantages of the present invention will
become readily apparent by reference to the following detailed
description when considered in conjunction with the accompanying
drawings, wherein:
[0016] FIG. 1 is a rear view showing an exemplary embodiment of a
light guide plate according to the present invention;
[0017] FIG. 2 is a partially-enlarged perspective view of the light
guide plate shown in FIG. 1;
[0018] FIG. 3 is a perspective view of a light guide cell shown in
FIG. 1;
[0019] FIG. 4 is a side view of a light guide cell shown in FIG.
3;
[0020] FIG. 5 is a perspective view showing another exemplary
embodiment of a light guide cell according to the present
invention;
[0021] FIG. 6 is a sectional view showing an exemplary embodiment
of a backlight assembly according to the present invention;
[0022] FIG. 7 is a sectional view showing another exemplary
embodiment of a backlight assembly according to the present
invention;
[0023] FIG. 8 is a sectional view showing another exemplary
embodiment of a backlight assembly according to the present
invention;
[0024] FIGS. 9A to 9C are views showing distribution of light
output from a light guide cell;
[0025] FIG. 10 is a sectional view showing another exemplary
embodiment of a backlight assembly according to the present
invention;
[0026] FIG. 11 is a perspective view of a bottom chassis shown in
FIG. 10;
[0027] FIG. 12 is a sectional view taken along line I-I' shown in
FIG. 11;
[0028] FIG. 13 is a plan view showing exemplary embodiments of
flexible printed circuit boards according to the present invention;
and
[0029] FIG. 14 is a plan view showing another exemplary embodiments
of flexible printed circuit boards according to the present
invention.
DESCRIPTION OF THE EMBODIMENTS
[0030] Hereinafter, the present invention will be explained in
detail with reference to the accompanying drawings.
[0031] FIG. 1 is a rear view showing an exemplary embodiment of a
light guide plate according to the present invention, and FIG. 2 is
a partially-enlarged perspective view of the light guide plate
shown in FIG. 1.
[0032] Referring to FIGS. 1 and 2, a backlight assembly 500
includes a light guide plate 100 and a plurality of light emitting
diodes (LEDs) 210 and 220 installed at a rear surface of the light
guide plate 100.
[0033] The light guide plate 100 includes a plurality of light
guide cells 110 that are integrally formed with each other. Each
light guide cell 110 includes first and second LEDs 210 and 220
that emit light in different directions. Each light guide cell 110
has first and second incident surfaces 111 and 112 to receive first
and second lights L1 and L2 emitted from the first and second LEDs
210 and 220. The first and second incident surfaces 111 and 112 of
the light guide cell 110 is offset from first and second incident
surfaces of an adjacent light guide cell. Thus, the first and
second lights L1 and L2 may not be concentrated on one spot in the
light guide plate 100.
[0034] For instance, if the light guide cells 110 are positioned to
form an angle with respect to each other in the light guide plate
100 as shown in FIG. 1, each light guide cell 110 receives first
and second lights L1 and L2 that travel in the direction different
from the first and second lights L1 and L2 that are incident on an
adjacent light guide cell. Thus, light is not concentrated on one
spot in the light guide plate 100, so that brightness uniformity of
the light output from the backlight assembly 500 may be
improved.
[0035] The light guide cells 110 of the light guide plate 100 have
the same structure, so the following description will be made with
reference to one light guide cell 110.
[0036] FIG. 3 is a perspective view of the light guide cell shown
in FIG. 1, and FIG. 4 is a side view of the light guide cell shown
in FIG. 3.
[0037] Referring to FIGS. 3 and 4, the light guide cell 110
includes a first incident surface 111, a second incident surface
112, a first side surface 113, a second side surface 114, an exit
surface 115 and a reflective surface 116.
[0038] The first and second incident surfaces 111 and 112 receive
lights L1 and L2 from the first and second LEDs 210 and 220,
respectively. The first LED 210 is provided adjacent to a first end
of the first incident surface 111 and the second LED 220 is
provided adjacent to a first end of the second incident surface
112. The first end of the first incident surface 111 is connected
to the first end of the second incident surface 112. In addition,
the thickness of the first and second incident surfaces 111 and 112
changes (e.g., decreases in the exemplary case shown) going from
the first end to the second end, which is opposite the first
end.
[0039] Meanwhile, the first side surface 113 faces the second
incident surface 112 and is connected to the second end of the
first incident surface 111. The second side surface 114 faces the
first incident surface 111 and is connected to the second end of
the second incident surface 112. In the present exemplary
embodiment of the present invention, the first side surface 113 has
a thickness t2 corresponding to a half of a maximum thickness t1 of
the first incident surface 111, and the second side surface 114 has
a thickness t2 corresponding to a half of a maximum thickness t1 of
the second incident surface 112.
[0040] The exit surface 115 interconnects the first and second
incident surfaces 111 and 112, and the first and second side
surfaces 113 and 114. The exit surface 115 has a planar structure
to output the light. The reflective surface 116 faces the exit
surface 115 and interconnects the first and second incident
surfaces 111 and 112, and the first and second side surfaces 113
and 114. The reflective surface 116 includes a first reflective
surface 116a connecting the first incident surface 111 to the first
side surface 113, and a second reflective surface 116b adjacent to
the first reflective surface 116a to connect the second incident
surface 112 to the second side surface 114.
[0041] Since the thicknesses of the first and second incident
surfaces 111 and 112 change with distance from the first ends, the
first and second reflective surfaces 116a and 116b incline toward
the exit surface 115 going from the first end to the second end.
Thus, the first and second reflective surfaces 116a and 116b may
effectively reflect the first and second lights L1 and L2, which
are incident through the first and second incident surfaces 111 and
112, toward the exit surface 115. Further, since the first and
second reflective surfaces 116a and 116b become closer to the exit
surface 117 as the first and second reflective surfaces 116a and
116b are remote from the first and second LEDs 210 and 220,
brightness degradation, which occurs at a region remote from the
LEDs 210 and 220, can be prevented.
[0042] FIG. 5 is a perspective view showing another exemplary
embodiment of a light guide cell according to the present
invention. In FIG. 5, the same reference numerals will be assigned
to elements identical to those of FIG. 3 and detailed description
thereof will be omitted in order to avoid redundancy.
[0043] Referring to FIG. 5, first and second inclined surfaces 117
and 118 are formed at first ends of the first and second incident
surfaces 111 and 112 while protruding outward from the first and
second inclined surfaces 117 and 118, respectively.
[0044] The first inclined surface 117 forms an angle to the first
incident surface 111 to guide the first light L1 of the first LED
210 toward the second side surface 114. The second inclined surface
118 is inclined relative to the second incident surface 112 to
guide the second light L2 of the second LED 220 toward the first
side surface 113.
[0045] As shown in FIG. 5, the first and second LEDs 210 and 220
are installed on the first and second inclined surfaces 117 and
118, respectively. The light path of the first and second lights L1
and L2 generated from the first and second LEDs 210 and 220 may be
enlarged due to the first and second inclined surfaces 117 and 118.
Thus, quantity of light supplied to an edge of the light guide cell
110 can be increased, so that the brightness of light output from
the exit surface 115 can be improved.
[0046] FIG. 6 is a sectional view showing an exemplary embodiment
of a backlight assembly 530 according to the present invention.
[0047] Referring to FIG. 6, the backlight assembly 530 includes
light guide cells 110, a plurality of LEDs 210, a reflective plate
310 and diffusion sheets 320.
[0048] The structure of the light guide cell 110 is identical to
that of the light guide cell 110 shown in FIGS. 1 and 2, so
detailed description thereof will be omitted.
[0049] The reflective plate 310 is provided below the light guide
cell 110 while facing the reflective surface 116 of the light guide
cell 110. The reflective plate 310 has a flat-plate structure and
includes reflective material having high reflectivity, such as
aluminum (Al). The reflective plate 310 sends the light that leaked
from the reflective surface 116 of the light guide cell 110 to be
incident on the light guide cell 110, thereby increasing the
quantity of light output through the exit surface 115 of the light
guide cell 110.
[0050] Meanwhile, the diffusion sheets 320 are provided above the
light guide cell 110 to diffuse the light output through the exit
surface 115 of the light guide cell 110. Thus, the brightness of
the light output from the backlight assembly 530 can be improved
due to the diffusion sheets 320.
[0051] FIG. 7 is a sectional view showing another exemplary
embodiment of a backlight assembly 550 according to the present
invention.
[0052] Referring to FIG. 7, the backlight assembly 550 includes a
reflective plate 330 that is provided at a lower portion of the
light guide cell 110 and has a shape identical to that of the light
reflective surface 116 of the light guide cell 110. The reflective
plate 330 is closely connected to the reflective surface 116 of the
light guide cell 110 to reflect the light toward the light guide
cell 110, which is leaked from the reflective surface 116.
[0053] Since the reflective plate 330 has substantially the same
shape as the reflective surface 116, the distance between the
reflective plate 330 and the reflective surface 116 can be reduced.
Consequently, light loss that occurs at the interface between the
reflective plate 330 and the reflective surface 116 can be reduced.
As a result, light efficiency of the backlight assembly 550 can be
improved.
[0054] As shown in FIG. 7, the reflective plate 330 has a plurality
of openings 331 which are formed at a region where the LEDs 210 are
installed. The light incident surface 111 of the light guide cell
110 is partially exposed through the openings 331, so that the
light emitted from the LEDs 210 can be incident into the light
guide cell 110 through the exposed incident surface 111.
[0055] FIG. 8 is a sectional view showing another exemplary
embodiment of a backlight assembly 570 according to the present
invention.
[0056] Referring to FIG. 8, the backlight assembly 570 includes a
light guide cell 110 having a diffusion pattern 115a formed on an
exit surface 115. The diffusion pattern 115a diffuses the light
that exits from the exit surface 115. The diffusion pattern 115a
can be formed through a printing process applying diffusion ink to
the exit surface 115 or a laser process irradiating laser on the
exit surface 115.
[0057] The diffusion pattern 115a may be uniformly or irregularly
distributed on the exit surface 115 according to quantity of light
that exits the exit surface 115. When the diffusion pattern 115a is
irregularly distributed on the exit surface 115, the diffusion
pattern 115a is sparsely formed on a region where a greater amount
of light is output, and the patterns are formed more closely to
each other on a region where a smaller amount of light is
output.
[0058] FIGS. 9A to 9C are views showing distribution of light
output from the light guide cell. FIG. 9A shows light distribution
when the diffusion pattern is not formed on the exit surface, FIG.
9B shows light distribution when the diffusion pattern is uniformly
formed on the exit surface, and FIG. 9C shows light distribution
when the diffusion pattern formed on the exit surface is adjusted
according to the amount of light that is received on each portion.
In FIGS. 9A to 9C, the light distribution is measured only at one
light guide cell TC, and remaining light guide cells NTC adjacent
to the light guide cell TC are in a dark state where the light is
not supplied.
[0059] Referring to FIGS. 9A to 9C, the light distribution is more
uniform when the diffusion pattern 115a is uniformly formed on the
exit surface 115 than when the diffusion pattern 115a is not formed
on the exit surface 115. In addition, the light distribution is
more uniform when the density of the diffusion pattern 115a is
adjusted according to quantity of light than when the diffusion
pattern 115a is uniformly formed on the exit surface 115.
[0060] FIG. 10 is a sectional view showing an exemplary embodiment
of a backlight assembly 590 according to the present invention.
[0061] Referring to FIG. 10, the backlight assembly 590 includes a
circuit board 410 provided below the reflective plate 330. A
plurality of LEDs 210 are mounted on the circuit board 410 and
circuit interconnections (not shown) are formed on the circuit
board 410 to supply power to the LEDs 210.
[0062] The circuit board 410 includes one of a printed circuit
board, a bottom chassis, and a flexible printed circuit board.
[0063] The circuit board 410 may also function as at least a
portion of the bottom chassis in FIGS. 10 and 11.
[0064] FIG. 11 is a perspective view of the bottom chassis 410
shown in FIG. 10, and FIG. 12 is a sectional view taken along line
I-I' shown in FIG. 11.
[0065] Referring to FIG. 11, the bottom chassis 410 is a container
including a bottom surface 411, and sidewalls 412 extending from
the bottom surface 411. The LEDs 210, the light guide cell 110, the
reflective plate 330, and the diffusion sheets 320 shown in FIG. 10
are accommodated in a receiving cavity defined by the bottom
surface 411 and the sidewalls 412.
[0066] The bottom surface 411 serves as a circuit board on which
the LEDs 210 are mounted. In detail, as shown in FIG. 12, the
bottom surface 411 includes a base substrate 411c, an insulating
layer 411d, an interconnection 411e, and a coating layer 411f.
[0067] The base substrate 411c includes aluminum (Al), and the
insulating layer 411d is coated on the base substrate 411c. Then,
the interconnection 411e including copper (Cu) is formed on the
insulating layer 411d. The interconnection 411e is covered with the
coating layer 411f, and a plurality of holes 411a and 411b are
formed in predetermined portions of the coating layer 411f where
the LEDs 210 are mounted to expose the interconnection 411e.
[0068] Since the bottom surface 411 of the bottom chassis 410
serves as the circuit board to mount a plurality of LEDs 210
thereon, the thickness of the backlight assembly 590 can be
reduced.
[0069] FIG. 13 is a plan view showing exemplary embodiments of a
flexible printed circuit boards 420 according to the present
invention.
[0070] Referring to FIG. 13, a plurality of flexible printed
circuit boards 420 are arranged below a light guide plate 100 in a
stripe pattern. First and second LEDs 210 and 220 are mounted on
the flexible printed circuit board 420 at a lower portion of the
light guide plate 100. Although not shown in the drawings, circuit
interconnections are provided on the flexible printed circuit board
420 to supply power to the first and second LEDs 210 and 220. Upon
receiving the power, the first and second LEDs 210 and 220 generate
light to supply the light to the light guide plate 100.
[0071] FIG. 14 is a plan view showing another exemplary embodiments
of flexible printed circuit boards 430 according to the present
invention.
[0072] Referring to FIG. 14, the flexible printed circuit boards
430 are arranged below the light guide plate 100 and have edges
formed in a zigzag pattern. The light guide cells 110 of the light
guide plate 100 are connected to each other such that first and
second incident surfaces 111 and 112 are in non-parallel planes, so
that the first and second LEDs 210 and 220 are irregularly
arranged.
[0073] As shown in FIG. 14, the zigzag-patterned edges of the
flexible printed circuit boards 430 allows more first and second
LEDs 210 and 220 to be mounted on one flexible printed circuit
board 430. As a result, the number of flexible printed circuit
boards 430 that is used to mount the first and second LEDs 210 and
220 can be reduced in the backlight assembly.
[0074] According to the above, the light guide plate includes the
light guide cells and at least one light source is aligned at one
side of each light guide cell, thereby improving brightness of the
backlight assembly and reducing thickness of the backlight
assembly.
[0075] Although the exemplary embodiments of the present invention
have been described, it is understood that the present invention
should not be limited to these exemplary embodiments but various
changes and modifications can be made by one ordinary skilled in
the art within the spirit and scope of the present invention as
hereinafter claimed.
* * * * *